/* ── Waterfall Chart ── bkbg-wfc-* ── */

.bkbg-wfc-editor-wrap {
    font-family: system-ui, -apple-system, sans-serif;
}

.bkbg-wfc-wrap {
    font-family: system-ui, -apple-system, sans-serif;
    box-sizing: border-box;
}

.bkbg-wfc-title {
    margin: 0 0 16px;
    font-family: var(--bkwfc-tt-ff, inherit);
    font-size: var(--bkwfc-tt-fsd, 20px);
    line-height: var(--bkwfc-tt-lhd, 1.25);
    letter-spacing: var(--bkwfc-tt-lsd, normal);
    word-spacing: var(--bkwfc-tt-wsd, normal);
    font-weight: var(--bkwfc-tt-fw, 700);
    font-style: var(--bkwfc-tt-fst, normal);
    text-decoration: var(--bkwfc-tt-td, none);
    text-transform: var(--bkwfc-tt-tt, none);
}

.bkbg-wfc-canvas-wrap {
    position: relative;
    width: 100%;
}

.bkbg-wfc-canvas-wrap canvas {
    display: block;
    max-width: 100%;
}

.bkbg-wfc-legend {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 18px;
    margin-top: 14px;
}

.bkbg-wfc-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
}

.bkbg-wfc-legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 3px;
    flex-shrink: 0;
}

.bkbg-wfc-tooltip {
    position: absolute;
    background: #1f2937;
    color: #fff;
    padding: 8px 12px;
    border-radius: 8px;
    font-size: 13px;
    pointer-events: none;
    z-index: 10;
    white-space: nowrap;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    transition: opacity 0.15s;
    opacity: 0;
}

.bkbg-wfc-tooltip.is-visible {
    opacity: 1;
}

.bkbg-wfc-tooltip-label {
    font-weight: 700;
    margin-bottom: 2px;
}

.bkbg-wfc-tooltip-value {
    opacity: 0.85;
}

/* ── Responsive typography ───────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .bkbg-wfc-title {
        font-size: var(--bkwfc-tt-fst1, var(--bkwfc-tt-fsd, 20px));
        line-height: var(--bkwfc-tt-lht, var(--bkwfc-tt-lhd, 1.25));
        letter-spacing: var(--bkwfc-tt-lst, var(--bkwfc-tt-lsd, normal));
        word-spacing: var(--bkwfc-tt-wst, var(--bkwfc-tt-wsd, normal));
    }
}
@media (max-width: 767px) {
    .bkbg-wfc-title {
        font-size: var(--bkwfc-tt-fsm, var(--bkwfc-tt-fst1, var(--bkwfc-tt-fsd, 20px)));
        line-height: var(--bkwfc-tt-lhm, var(--bkwfc-tt-lht, var(--bkwfc-tt-lhd, 1.25)));
        letter-spacing: var(--bkwfc-tt-lsm, var(--bkwfc-tt-lst, var(--bkwfc-tt-lsd, normal)));
        word-spacing: var(--bkwfc-tt-wsm, var(--bkwfc-tt-wst, var(--bkwfc-tt-wsd, normal)));
    }
}